I started having problems with ds1 and aggression from about 18 months. He was so bad that I could barely look away without him whacking someone. Finally at about 3 he seemed to calm right down, to the point that I could actually relax at playgroups/playgrounds etc. But recently he seems to have reverted back a bit, and I feel really depressed about it. He's not as bad as he used to be, but he will hit out at other children, even much younger, someone times for no obvious reason. I have started warning him after the first incident that if it happens again, we will leave. That does help to a degree, but I still feel like I have to watch him like a hawk. He's also developed the attitude of a teenager and can be really rude. Is this normal or am I doing something really wrong? He can also be loving, kind and funny, so he's not all bad!Just can't wait for school to start!